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Modified exergoeconomic modeling of geothermal power plants

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  • Coskun, C.
  • Oktay, Z.
  • Dincer, I.

Abstract

In this study, a modified exergoeconomic model is proposed for geothermal power plants using exergy and cost accounting analyses, and a case study is in this regard presented for the Tuzla geothermal power plant system (Tuzla GPPS) in Turkey to illustrate an application of the currently modified exergoeconomic model. Tuzla GPPS has a total installed capacity of 7.5 MW and was recently put into operation. Electricity is generated using a binary cycle. In the analysis, the actual system data are used to assess the power plant system performance through both energy and exergy efficiencies, exergy losses and loss cost rates. Exergy efficiency values vary between 35% and 49% with an average exergy efficiency of 45.2%. The relations between the capital costs and the exergetic loss/destruction for the system components are studied. Six new exergetic cost parameters, e.g., the component annualized cost rate, exergy balance cost, overall unavoidable system exergy destruction/loss cost rate, overall unavoidable system exergy destruction/loss cost rate, overall unavoidable system exergy production cost rate and the overall unavoidable system exergy production cost rate are studied to provide a more comprehensive evaluation of the system.

Suggested Citation

  • Coskun, C. & Oktay, Z. & Dincer, I., 2011. "Modified exergoeconomic modeling of geothermal power plants," Energy, Elsevier, vol. 36(11), pages 6358-6366.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:11:p:6358-6366
    DOI: 10.1016/j.energy.2011.09.038
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    6. Gerber, Léda & Maréchal, François, 2012. "Environomic optimal configurations of geothermal energy conversion systems: Application to the future construction of Enhanced Geothermal Systems in Switzerland," Energy, Elsevier, vol. 45(1), pages 908-923.
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